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Abstract <p>The results of a study on the quantum yield of various photocathodes designed to detect X-ray radiation with an energy above 40 keV are presented. Experiments have been conducted with photocathode samples made of CsI, LaB<sub>6</sub>, CdWO<sub>4</sub>, and ZnWO<sub>4</sub> using synchrotron radiation from the wiggler at the VEPP-4M accelerator. These materials have been chosen due to their high atomic numbers <i>Z</i>, which ensures effective interaction with X-rays through the photoelectric effect. The study has been carried out in the energy range 40–100 keV, which corresponds to the conditions of experiments on fast-flowing physical processes requiring high temporal and spatial resolution. The data obtained allow us to determine the most suitable materials for creating effective photocathodes in electron-optical converters for recording fast physical processes.</p>

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Measurement of Quantum Efficiency of Photocathodes in the Photon Energy Range 40–100 keV

  • 期刊论文

  • 发表日期：

    2025年8月1日

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  • N. S. Vorobiev,
  • O. I. Meshkov,
  • N. I. Razumov,
  • S. V. Reva,
  • B. P. Tolochko,
  • E. V. Shashkov

摘要

Abstract

The results of a study on the quantum yield of various photocathodes designed to detect X-ray radiation with an energy above 40 keV are presented. Experiments have been conducted with photocathode samples made of CsI, LaB6, CdWO4, and ZnWO4 using synchrotron radiation from the wiggler at the VEPP-4M accelerator. These materials have been chosen due to their high atomic numbers Z, which ensures effective interaction with X-rays through the photoelectric effect. The study has been carried out in the energy range 40–100 keV, which corresponds to the conditions of experiments on fast-flowing physical processes requiring high temporal and spatial resolution. The data obtained allow us to determine the most suitable materials for creating effective photocathodes in electron-optical converters for recording fast physical processes.